Antirust material



Patented June 7, 1938 iiJNlTED STATES PAENT GFFlE AN TIRUST MATERIAL poration of Indiana No Drawing. Application March 31, 1937, Serial No. 134,122

compositions of matter for use as anti-rust materials.

It is an object of our invention to provide compositions of matter which adhere tenaciously to metal surfaces and are highly effective in preventing the corrosion and/or rusting thereof.

It is another object of this invention to provide compositions of matter which are superior slushing or anti-rust compounds.

Other objects and advantages of our invention will become apparent from the following descrip tion thereof. We have found that very effective corrosion and/or anti-rust properties are imparted to coating materials by the use of oil-soluble sulfonic soaps and the product obtained by the acid treatment of condensation products obtained by reacting a halogenated hydrocarbon, such as, chlorinated parafiin wax with an arcmatic hydrocarbon, for instance, naphthalene, in the presence of a catalyst of the aluminum chloride type. Condensation products of this type as made by the processes of one of the present in ventors or by similar processes are known as Pourex and are described, for instance, in U. S. Patents Nos. 1,963,917, 1,963,918 and 2,057,104. Other similar condensation products can be used.

The acid treatment of Pourex or other similar products is preferably accomplished by the use of fuming sulfuric acid although concentrated sulfuric acid can be used. I prefer to treat with about 1 pound of 104 sulfuric acid per gallon of Pourex or other similar condensation products, although one tenth to 3 pounds of acid per gallon of condensation product may be used.

The condensation product per so may be acid treated at elevated temperatures or the condensation product may be diluted in a light hydrocarbon solvent and acid treated at about room temperature. The following procedures may be followed: The condensation product may be treated at 140 F. to 150 F. with 1 pound of 104 /2% sulfuric acid per gallon of Pourex (or other similar condensation product) and the mass neutralized with ammonium hydroxide after the excess acid has settled out. The neutralized product is then dissolved in naphtha (4 to 8 volumes per volume of product), settled and/or strained free from salts and then reduced in a still using fire and steam.

The other method of acid treating the condensation product consists in diluting the Pourex in 3 to 6 volumes of naphtha and acid treating the diluted Pour-ex at about to F. with 1 pound of 104 sulfuric acid per gallon of Pourex. The reaction mass is then settled, neutralized and reduced as .in the above first method.

We prefer to use ammonia in the neutralization step since any excess is readily removed. However, sodium hydroxide and other alkalies may be used.

In the acid treating step agitation is necessary in order to obtain good contacts. This should be effected by mechanical means or by means of an inert gas since we have found that air blowing destroys the desired properties of the acid treated Pourex. It is believed some sort of oxidation occurs which causes this change in the acid treated Pourex. The product obtained by acid treating Pourex using mechanical agitation or agitation by means of an inert gas possesses the desired metal wetting properties.

The oil soluble sulfonic acid soaps used in our compositions are preferably the so-cal1ed mahogany soaps or alkali metal salts of preferentially oil-soluble sulfonic acids derived from mineral oils described in the Humphrey U. S. Patent No, 1,286,179 or in any other suitable manner.

In our co-pending patent application Serial No. 78,932, filed May 9, 1936 of which the present application is a continuation in part, it was pointed out that the acid treated condensation products are more satisfactory and more effective than most prior art materials for use as slushing compounds or as a constituent in slushing compounds. We have now found that anti-rust and/or slushing compositions of which the acid treated condensation product is one of the constituents may be still further improved by incorporating therein the preferentially oil-soluble sulfonic soaps and preferably mahogany soap. While we may use mixes comprising substantially entirely acid treated Pourex or other similar condensation products and mahogany soap, for example mixes comprising 65 to 99% acid treated Pourex and 1 to 35% mahogany soap, we prefer to add various amounts of oils or waxes or both oil and wax to the mixture.

For liquid slushing compositions we have found that mixes of approximately 3 to 30% mahogany soap, 1 to 20% acid treated Pourex and 50 to 96% oil was very effective in providing adequate protection to the metal surfaces to which they were applied.

The consistency of the compositions can be varied to suit the need, oils of various viscosities being used to obtain anti-rust compositions of the desired fluidity. If necessary anti-rust compositions of proper viscosity may be obtained by mixing oils of high viscosity with oils of low viscosity. The following specific examples are illustrative of compositions which have been found to be very effective in protecting metal surfaces Saybolt universal viscosity of mix at F 111 seconds A product having the composition of Example II is particularly Well. suited for protecting highly finished metal articles, such as fishing reels, razor blades, cutlery, and the like, from rusting and fingerprint markings due to handling. It also has been found to be very effective in protecting the interior surfaces of gun barrels against aftercorrosion, that is, corrosion in the gun barrel due to the corrosion effects of the products of detonation.

Under certain conditions it is better to employ anti-rust compositions which are semi-solid or solid. Under the most severe conditions of exposure, such as exposure to heavy rains, hot suns, dirt and dust, liquid anti-rust materials are not as effective as the semi-solid or solid anti-rust compositions. When an anti-rust oil is used under these conditions there is danger of it being Washed off by the rain, leaving the surface exposed to rusting. Exposure to, the hot sun tends to evaporate the lighter anti-rust oils and dirt and dust falling upon the oil surfaces absorbs the oil and makes it ineffective as a protecting film. For these reasons the use of semi-solid or solid anti-rust compositions (hereinafter referred to as anti-rust greases) is to be preferred to oil for protection under severe conditions.

We have found that suitable anti-rust greases may be prepared with waxes such as parafiin wax, Montan wax, carnauba wax, etc. and with petrolatums in combination with mahogany soap and acid treated Pourex. Oil may also be used in these mixes to obtain the desired consistency. As the waxconstituent we prefer to use a refined grade of petrolatum wax, for instance, one having a'melting point of at least about F. Another wax we may use to advantage is a refined grade of very high melting point wax known commercially as Superla wax or its equivalent. Superla wax is a tacky petroleum wax having a melting point of from about F. to about F. or above. We may also use as one of the constituents petrolatums and/or petrolatum base stocks or mixtures of each or both of these with waxes.

A suitable semi-solid anti-rust grease is one having the following formula:

Percent Mahogany soap 2 to 10 Mineral oil 25 to 55 Petrolatum 40 to 70 Acid treated Pourex 2 to 15 The oil in the above composition is preferroom temperature is one having the following composition:

Percent Mahogany soap 8 Petrolatum v 65 Superla wax 1'! Acid treated Pourex 10 Anti-rust greases which are solid at room temperatures are usually melted to facilitate application to the article to be protected, the melted composition being applied either by dipping the article into the molten material or by applying the molten material by means of a brush or spray. To facilitate the application of the solid antirust greases without heating the same, the same may be thinned, using a hydrocarbon solvent such as oleum spirits as a thinner.

The percentages of mahogany soap given herein are on an oil-free basis and the percentages of all the constituents are on a weight basis.

While we have described our invention in connection with certain specific embodiments thereof it is to be understood that these are by way of illustration only and not by way of limitation.

We claim:

1. An improved slushing composition compris ing from about 1% to about 35% by weight mahogany soap and from about 65% to about 99% the following composition by weight: 7

Percent Fuming sulfuric acid treated condensation product of chlorinated wax and an aromatic hydrocarbon lto 20 Oil-soluble sulfonic soap 3 to 30 Oil 50 to-96 4. A corrosion resistant metal adherent composition of matter comprising from about 1% to about 3 5% by weight of an oil soluble petroleum sulfonic soap, from about 1% to about 20% by' weight of a condensation product of chlorinated wax and an aromatic hydrocarbon, said condensation product having been subjected to treatment with fuming sulfuric acid, mineral oil and a wax.

5. A slushing compound having approximately the following composition by weight:

Percent Fuming sulfuric acid treated condensation product of chlorinated wax and an aromatic hydrocarbon 2 Mahogany soap 20 Lubricating oil 78 6. An improved slushing composition having approximately the following composition by weight:

7 Percent Fuming sulfuric acid treated condensation product of chlorinated wax and an aromatic hydrocarbon 2 Mahogany soap 11 Pale paraflin oil 87 7. A composition of matter for use in protecting metals from corrosion comprising from about 1% to about by weight of an oil-soluble sodium sulfonate obtained by the neutralization of acid,

sludge resulting from thesulfuric acid treatment of mineral lubricating oils, from about 1% to about 20% by Weight of a fuming sulfuric acid treated condensation product of chlorinated wax and an aromatic hydrocarbon, and petrolatum.

8. A corrosion resistant metal adherent composition of matter comprising the following ingredients in about the following proportions by weight:

Percent Fuming sulfuric acid treated condensation product of chlorinated wax and an aromatic hydrocarbon 2 to 15 Oil-soluble sodium sulfonate 2 to 10 Mineral oil 25 to Petrolatum 40 to 9. A composition of matter for use in protecting metals from corrosion comprising a substantial amount but less than about 35% by Weight of an oil-soluble sodium sulfonate obtained by the neutralization of sulfonic acids resulting from the sulfuric acid treatment of mineral lubricating oils, up to about 20% by weight of a fuming sulfuric acid treated condensation product of chlorinated Wax and an aromatic hydrocarbon, petrolatum and a petroleum wax having a melting point above F.

10. A composition of matter for use in protect-- ing metals from corrosion comprising a substantial amount but less than about 35% by weight of an oil-soluble sodium sulfonate obtained by the neutralization of sulfonic acids resulting from the sulfuric acid treatment of mineral lubricating oils, from about 1% to about 20% by weight of a fuming sulfuric acid treated condensation product of chlorinated wax and an aromatic hydrocarbon, petrolatum, a petroleum wax having a melting point above 140 F. and a volatile hydrocarbon solvent.

11. An improved slushing grease having approximately the following composition by weight:

. Percent Sulfuric acid treated condensation product of chlorinated wax and an aromatic hydrocarbon 10 Mahogany soap 8 Petrolatum 65 Refined wax (melting point over 140 F.) 1'7 FREDERICK H. MACLAREN. LAWRENCE C. BRUNSTRUM.

CERTIFIGATEOF CORRECTION. Patent No. 2,119,555. June. 7, 19

FREDERICK H. HBGLABEN, ET AL.

It is hereby certified that error appears in the printed apecifiication of the above numbered patent requiring correction as follows: Page i, second lcolmnn lin'e MB, for the word "was" .read were; page 2, first coluimn, line 156, for "petrolatum" read petroleum; and that the said Letters Patent should be read with these corrections thereinthat the same may conform to the rec'- ord of the case in' the Patent Office.

Signed and sealed this 12th day of July,- A. D. 1958.

Henry Van Arsdale,

(Seal) Acting Commissioner of Patents.

CERTIFICATE JOF CORRECTION.

Patent No. 2,119,55

FREDERICK H. MacIAREN, ET AL.

June; 7, 19

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows Page i, second column, lin'e b8, for the word "was" read were; page 2, first column, line 56, for petrolatum read. petroleum; and that the said Letters Patent should be read with these corrections thereintha't the same may conform to the rec- 0rd of the case in' the Patent Office.

Signed and. sealed this 12th day of July, A. D. 1958.

' Henry Van Arsdale, (Seal) Acting Commissioner of Patents. 

